A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial T41), circulated but still in good condition, might fetch anything from £2 to £8 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
Please check the serial number and provide the name of the Chief Cashier if possible.
Without additional context, the value of a Bank of England Ten shilling note with serial number 18Y 015906 would depend on factors such as its condition, rarity, and demand among collectors. I recommend consulting with a currency appraiser or a numismatic expert for a precise valuation.
It is worth 5 pence if you mean the English shilling
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier J.S. Fforde - serial C89N), uncirculated and in absolute mint condition could fetch anything up to £10 GBP. If it has been circulated, not much. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial H47), circulated but still in good condition, might fetch anything from £2 to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial C02), circulated but still in good condition, might fetch anything from £2 to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series A - mauve)(Chief Cashier K.O. Peppiat - serial N64D), uncirculated and in absolute mint condition could fetch anything up to £65 GBP. If it has been circulated but still in good condition, it might fetch anything from £20 to £34 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier J.Q. Hollom - serial 26H), uncirculated and in absolute mint condition could fetch anything £8 GBP. If it has been circulated but still in good condition, it might fetch anything up to £4 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial H90), uncirculated and in absolute mint condition could fetch anything £10 GBP. If it has been circulated but still in good condition, it might fetch anything from £2 to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Wartime emergency issue)(Series A - mauve)(Chief Cashier K.O. Peppiatt - serial Y81E), uncirculated and in absolute mint condition could fetch up to £80 GBP. If it has been circulated but still in good condition, it might fetch anything from £30 to £65 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier J.S. Fforde - serial C30N), uncirculated and in absolute mint condition could fetch anything up to £10 GBP. If it has been circulated but still in good condition, it might fetch anything from £2 to £4 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier L.K. O'Brien - serial A12), uncirculated and in absolute mint condition could fetch anything £12 GBP. If it has been circulated but still in good condition, it might fetch anything from £3 to £9 GBP. A reputable coin dealer will be able to give a more accurate valuation.